<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul
          class="cart-list"
          v-for="(cart, index) in cartInfoList"
          :key="index"
        >
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked == 1"
              @click="updateChecked(cart, $event)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">{{ cart.skuName }}</div>
          </li>
          <li class="cart-list-con3">
            <div class="item-txt">{{ cart.operateTime }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.cartPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="handlerNum('minus', -1, cart)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              :value="cart.skuNum"
              minnum="1"
              class="itxt"
              @change="handlerNum('agility', $event.target.value * 1, cart)"
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="handlerNum('add', 1, cart)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.cartPrice * cart.skuNum }}</span>
          </li>
          <li class="cart-list-con7">
            <a href="#none" class="sindelet" @click="deleteCart(cart.skuId)"
              >删除</a
            >
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all" @click="handlerCheckedAll()">
        <input class="chooseAll" type="checkbox" :checked="isAllChecked&&cartInfoList.length>0" ref="chooseAll"/>
        <span>全选</span>
      </div>
      <div class="option">
        <a href="#none" @click="deleteCheckedGoods">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择 <span>{{ countOfChecked }}</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalprice }}</i>
        </div>
        <div class="sumbtn" @click="goTrade">
          <a class="sum-btn">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapGetters } from "vuex";
import throttle from "lodash/throttle";
import debounce from "lodash/debounce";
export default {
  name: "ShopCart",
  data(){
    return{
    }
  },
  computed: {
    ...mapGetters("shopcart",["cartInfoList"]),
    // 全选按钮勾选判断
    isAllChecked() {
      return this.cartInfoList.every((item) => item.isChecked == 1);
    },

    //统计商品勾选个数
    countOfChecked(){
      // 定义中间量存储
      let count = 0
      this.cartInfoList.forEach((item)=>{
        if(item.isChecked == 1) count++;//isCheck == 1时自增
      })
      return count;
    },

    //结算总价
    totalprice(){
      //  定义中间量存储
      let price = 0
      this.cartInfoList.forEach((item)=>{
        if(item.isChecked == 1) price += (item.skuPrice*item.skuNum);//isCheck == 1时自增
      })
      return price;
    }
  },

  methods: {
    getData() {
      //派发actions
      this.$store.dispatch("shopcart/getCartList");
    },

    handlerNum: throttle(async function (type, disNum, cart) {
      //节流:设置为1秒内只执行一次
      //处理购买数量
      // type:事件辨识 disNum:数量前后差异值 id：产品id
      switch (type) {
        case "add":
          disNum = 1;
          break;
        case "minus":
          cart.skuNum > 1 ? (disNum = -1) : (disNum = 0);
          break;
        case "agility":
          if (isNaN(disNum) || disNum < 1) {
            disNum = 0;
          } else {
            //正常情况
            disNum = parseInt(disNum) - cart.skuNum;
          }
          console.log("disNum:" + disNum);
          break;
      }
      try {
        // 派发detail的actions
        await this.$store.dispatch("detail/addOrUpdateShopCart", {
          goodsId: cart.skuId,
          goodsNum: disNum,
        });
        this.getData();
      } catch (error) {
        console.log(error.message);
      }
    }, 500),

    //购物车删除商品
    async deleteCart(goodsId) {
      try {
        await this.$store.dispatch("shopcart/deleteCart", goodsId);
        this.getData(); //重新获取数据
      } catch (error) {
        alert(error.massage);
      }
    },

    // 切换商品选中状态
    async updateChecked(cart, event) {
      //获取isChecked
      let checked = event.target.checked ? '1' : '0';
      try {
        await this.$store.dispatch("shopcart/updateIsChecked", {
          goodsId: cart.skuId,
          isChecked: checked,
        });
        this.getData(); //重新获取数据
      } catch (error) {
        alert(error.massage);
      }
    }, 

    // 处理删除选中商品按钮
    async deleteCheckedGoods(){
      try {
        //派发actions
      await this.$store.dispatch('shopcart/handlerDeleteChecked')
      this.getData()//重新发送请求
      } catch (error) {
        alert(error.message)
      }
    },

    // 全选按钮
    async handlerCheckedAll(){
      try {
        let checked = this.$refs.chooseAll.checked ? 1 : 0
      //  派发actios
      await this.$store.dispatch("shopcart/updateCheckedAll",checked)
      this.getData()
      } catch (error) {
        alert(error.message)
      }
    },

    // 结算按钮
    goTrade(){
      this.$router.push("/trade")
    },
  },

  beforeMount() {
    this.getData();
  },
};
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 4.1667%;
        }

        .cart-list-con2 {
          width: 25%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con3 {
          width: 20.8333%;

          .item-txt {
            text-align: center;
          }
        }

        .cart-list-con4 {
          width: 12.5%;
        }

        .cart-list-con5 {
          width: 12.5%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 12.5%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 12.5%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>